10,000 global variables? Oh boy

1

10,000 global variables? Oh boy…

http://www.safetyresearch.net/blog/articles/toyota-unintended-acceleration-and-big-bowl-“spaghetti”-code

2

And recursive programming…

3

The highest price per line of code ever, more than the shuttle computers, for example. Granted, for lawyers, not programmers, doing it right would have been much cheaper.

4

This is going to be one of the textbooks. Next to the Therac-25.

5

While 10,000 seems extremely high, I’d be curious what the industry standard for auto software is. i.e. how their code compared to everyone else in the industry

6

The code is very carefully engineered to have a single writer for each global variable (enforced by tools). That way, they get lock-free fast communication without overheads.